Double-Pulse Generation of Indistinguishable Single Photons with Optically Controlled Polarization

Yan, Junyong; Liu, Shunfa; Lin, Xing; Ye, Yongzheng; Yu, Jiawang; Wang, Lingfang; Yu, Ying; Zhao, Yanhui; Meng, Yuedong; Hu, Xiaolong; Wang, Dawei; Jin, Chao-Yuan; Liang, Feng

doi:10.1021/acs.nanolett.1c03543

Cited by 23 publications

(18 citation statements)

References 47 publications

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“…However, two‐photon‐excitation was recently combined with a trigger pulse to stimulate emission of highly polarized, indistinguishable photons. [ 153,154 ]…”

Section: Quantum Dot Based Quantum Light Sourcesmentioning

confidence: 99%

“…However, two-photonexcitation was recently combined with a trigger pulse to stimulate emission of highly polarized, indistinguishable photons. [153,154] While the coherent control of QD excitons in the form of Rabi oscillations was first observed in pump-probe experiments, [155,156] a variety of coherent excitation schemes is nowadays available. Examples range from adiabatic rapid passage, [157][158][159] over bichromatic excitation, [128,160] to recent theory proposals for swing-up schemes using frequency-modulated or spectrally far detuned laser pulses.…”

Section: Semiconductor Quantum Dotsmentioning

confidence: 99%

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Quantum Communication Using Semiconductor Quantum Dots

et al. 2022

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Worldwide, enormous efforts are directed toward the development of the so-called quantum internet. Turning this long-sought-after dream into reality is a great challenge that will require breakthroughs in quantum communication and computing. To establish a global, quantum-secured communication infrastructure, photonic quantum technologies will doubtlessly play a major role, by providing and interfacing essential quantum resources, for example, flying-and stationary qubits or quantum memories. Over the last decade, significant progress has been made in the engineering of on-demand quantum light sources based on semiconductor quantum dots, which enable the generation of close-to-ideal single-and entangled-photon states, useful for applications in quantum information processing. This review focuses on implementations of, and building blocks for, quantum communication using quantum-light sources based on epitaxial semiconductor quantum dots. After reviewing the main notions of quantum communication and introducing the devices used for single-photon and entangled-photon generation, an overview of experimental implementations of quantum key distribution protocols using quantum dot based quantum light sources is provided. Furthermore, recent progress toward quantum-secured communication networks as well as building blocks thereof is summarized. The article closes with an outlook, discussing future perspectives in the field and identifying the main challenges to be solved.

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“…However, two‐photon‐excitation was recently combined with a trigger pulse to stimulate emission of highly polarized, indistinguishable photons. [ 153,154 ]…”

Section: Quantum Dot Based Quantum Light Sourcesmentioning

confidence: 99%

Section: Semiconductor Quantum Dotsmentioning

confidence: 99%

Quantum Communication Using Semiconductor Quantum Dots

et al. 2022

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“…Although the emitted exciton polarization is random, which would limit the brightness to half the values of Fig. 1c, recent works have shown the possibility of deterministically preparing the exciton polarization with near-unit brightness by adding a stimulated biexciton excitation after the original twophoton excitation [56][57][58] .…”

Section: Comparison Of Pumping Schemesmentioning

confidence: 99%

“…We will therefore also assume that states emitted under TPE present vanishing off-diagonal elements. Note that this assumption is expected to hold for the stimulated schemes discussed in [56][57][58] , since the remaining jitter due to the biexciton transition is significantly larger than the jitter responsible for coherence erasure.…”

Section: Photon-number Coherencementioning

confidence: 99%

Enhancing quantum cryptography with quantum dot single-photon sources

et al. 2022

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Quantum cryptography harnesses quantum light, in particular single photons, to provide security guarantees that cannot be reached by classical means. For each cryptographic task, the security feature of interest is directly related to the photons’ non-classical properties. Quantum dot-based single-photon sources are remarkable candidates, as they can in principle emit deterministically, with high brightness and low multiphoton contribution. Here, we show that these sources provide additional security benefits, thanks to the tunability of coherence in the emitted photon-number states. We identify the optimal optical pumping scheme for the main quantum-cryptographic primitives, and benchmark their performance with respect to Poisson-distributed sources such as attenuated laser states and down-conversion sources. In particular, we elaborate on the advantage of using phonon-assisted and two-photon excitation rather than resonant excitation for quantum key distribution and other primitives. The presented results will guide future developments in solid-state and quantum information science for photon sources that are tailored to quantum communication tasks.

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“…Still, exciton preparation is limited to 0.85-0.90 fidelity both in experiments and theory [17,18], thus posing a fundamental limitation towards further increasing the efficiency. Promising strategies involving a periodic swingup scheme [19,20] or stimulated emission from the biexciton level [21][22][23] have been recently proposed. The former resulted in 0.97 population inversion estimated in experiments [20], while the latter has generated single photons with 0.93 indistinguishability and in-fiber efficiency of 0.51 [22].…”

mentioning

confidence: 99%

Phonon-decoupled di-chromatic pumping scheme for highly efficient and indistinguishable single-photon sources

Vannucci¹,

Gregersen²

2022

Preprint

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A key problem within single-photon sources engineering is to achieve population inversion of a quantum emitter on-demand and with the highest possible fidelity, without resorting to resonant laser pulses. A non-resonant pumping signal has the advantage of being separated in frequency from the single photons, but it typically triggers -or makes active use of -incoherent phonon-assisted scattering events, which preclude near unity fidelity in the population inversion and deteriorate the quality of the emitted photons. Here, we theoretically show that a coherent di-chromatic pumping scheme using short laser pulses and moderately large detuning effectively decouples the emitter from its phonon bath, allowing for population inversion arbitrarily close to unity. When considering a micropillar single-photon source driven with this scheme, we calculate very high photon emission into the cavity mode (0.953 photons per pulse), together with excellent indistinguishability (0.975). Such values are uniquely bounded by decoherence in the emission dynamics or practical considerations, and not by the excitation scheme.

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Double-Pulse Generation of Indistinguishable Single Photons with Optically Controlled Polarization

Cited by 23 publications

References 47 publications

Quantum Communication Using Semiconductor Quantum Dots

Quantum Communication Using Semiconductor Quantum Dots

Enhancing quantum cryptography with quantum dot single-photon sources

Phonon-decoupled di-chromatic pumping scheme for highly efficient and indistinguishable single-photon sources

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